本文選題：DP80-3型三缸單作用隔膜泵 + 電液比例方向閥　； 參考：《蘭州理工大學(xué)》2011年碩士論文

【摘要】：從上世紀(jì)70年代以來,隨著料漿輸送設(shè)備的迅速發(fā)展,隔膜泵在礦山、電站、冶金、石油及化工等各個行業(yè)得到了越來越普遍的應(yīng)用。但目前傳統(tǒng)隔膜泵的驅(qū)動形式大多為傳統(tǒng)的機(jī)械式曲柄滑塊機(jī)構(gòu),使得泵的流量脈動、震動和噪聲較大,體積大以及制造成本高。因此,一種性價(jià)比高的新型動力端來代替?zhèn)鹘y(tǒng)的機(jī)械式動力端已成為未來隔膜泵發(fā)展的趨勢。 本課題在研究當(dāng)前傳統(tǒng)隔膜泵的基礎(chǔ)上,針對DP80-3型隔膜泵動力端開展分析和設(shè)計(jì),探討解決傳統(tǒng)隔膜泵存在的問題,設(shè)計(jì)了一種新型的三缸單作用液壓動力端,可為液壓隔膜泵的研究提供理論參考。 本課題在分析當(dāng)前常用的液壓缸速度控制回路的基礎(chǔ)上,設(shè)計(jì)了負(fù)載傳感液壓動力端,主要由三個單桿液壓缸和一個主變量泵組成。具有節(jié)流損失小,結(jié)構(gòu)簡單,一次性制造成本低,安裝維修方便,占地面積小,市場競爭力強(qiáng)等特點(diǎn)。同時,還選擇了所需液壓元件的規(guī)格和尺寸,建立了電液比例方向閥控液壓缸和電液伺服換向閥控變量泵的線性數(shù)學(xué)模型,并在課題最后對系統(tǒng)液壓缸的速度控制和變量泵的泵壓控制的控制策略進(jìn)行了理論研究和MATLAB/Simulink仿真,仿真結(jié)果和預(yù)期的結(jié)果有較好的一致性。本課題還深入研究了隔膜泵工作過程中液壓缸的運(yùn)行速度曲線,研究表明三個液壓缸只有保持120度的相位角并按規(guī)定的速度曲線工作才能有效減輕隔膜泵的流量脈動、震動和噪聲。同時,對液壓隔膜泵動力端控制系統(tǒng)的硬件和軟件實(shí)現(xiàn)進(jìn)行了研究,選擇了在控制過程中所需的PLC和相應(yīng)的硬件模塊,并對液壓缸運(yùn)行速度曲線在PLC控制器內(nèi)的存儲方式進(jìn)行了一定的探討。最終確定速度曲線按定時20ms變地址存儲的原則,存儲到PLC的用戶存儲器中。液壓缸運(yùn)行速度、位置的測量采用旋轉(zhuǎn)增量式光電編碼器,具有精度高、分辨力高、可靠性好、不需要A/D轉(zhuǎn)換等特點(diǎn),并可實(shí)現(xiàn)單個傳感器測量多種變量的功能。
[Abstract]:Since the 70s of last century, with the rapid development of slurry conveying equipment, diaphragm pumps have been used more and more widely in various industries, such as mine, power plant, metallurgy, petroleum and chemical industry. However, most of the traditional diaphragm pumps are driven by traditional mechanical crank slider, which make the pump flow pulsating, vibration and noise larger. As a result, a new type of high power cost terminal instead of the traditional mechanical power end has become the trend of the development of diaphragm pumps in the future.
On the basis of the study of the current traditional diaphragm pump, this paper aims at the analysis and design of the power end of the DP80-3 diaphragm pump, and discusses the problems existing in the traditional diaphragm pump. A new type of three cylinder single action hydraulic power end is designed, which can provide theoretical reference for the research of the hydraulic diaphragm pump.
Based on the analysis of the current hydraulic cylinder speed control loop, this paper designs the load sensing hydraulic power end, mainly composed of three single rod hydraulic cylinders and a main variable pump, which has the characteristics of small loss of throttling, simple structure, low cost of one-time manufacture, small area of installation and maintenance, and strong market competitiveness. The specifications and sizes of the required hydraulic components are also selected, and the linear mathematical model of the electro-hydraulic proportional directional valve controlled hydraulic cylinder and the electro-hydraulic servo valve control variable pump is set up. At the end of the subject, the control strategy of the speed control of the hydraulic cylinder and the control of the pump pressure of the variable pump is studied, and the simulation of the simulation is made by the MATLAB/Simulink simulation. There is a good consistency between the results and the expected results. This subject has also studied the running speed curve of the hydraulic cylinder in the working process of the diaphragm pump. The research shows that the three hydraulic cylinders can only keep the phase angle of 120 degrees and work according to the prescribed speed curve to effectively reduce the flow pulsation, vibration and noise of the diaphragm pump. The hardware and software realization of the power end control system are studied, the PLC and the corresponding hardware modules needed in the control process are selected, and the storage mode of the running speed curve of the hydraulic cylinder in the PLC controller is discussed. Finally, the principle of the speed curve according to the timing 20ms to the address storage is determined, and the user is stored to the PLC user. In memory, the speed of the hydraulic cylinder and the position are measured by the rotary incremental photoelectric encoder, which has the characteristics of high precision, high resolution, good reliability, no A/D conversion and so on, and can realize the function of measuring a variety of variables by a single sensor.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH137.51

【引證文獻(xiàn)】

相關(guān)期刊論文 前2條

1 張洪生;繳文會;張宏利;崔繼強(qiáng);;三缸單作用隔膜泵新型液壓動力端研究[J];機(jī)床與液壓;2013年05期

2 白金鳳;牟忠良;;HBMD-90/16-320S型煤礦用回填泵的研發(fā)[J];煤炭工程;2013年05期

，

本文編號：2004301